DIFFERENTIATION OF THE CONTRIBUTION OF COLLISIONS CHANGING THE SPEED OF PARTICLES TO THE ATTENUATION OF THE STIMULATED PHOTON ECHO RESPONSE IN GAS

Abstract

The effect of collisions for which the particle velocity is changed on the intensity of the stimulated photon echo response in a gaseous medium is investigated. It is shown that such collisions have the greatest influence on the intensity for the non-parallel wave vectors of exciting pulses. An approximate dependence of the intensity of the response of the stimulated photon echo on the time interval between the second and third exciting laser pulses is proposed. This dependence permits to differentiate the contribution of collisions with the change of the velocity of particles to the attenuation of the response. It is of interest for optical coherent echo spectroscopy.